11
votes
Accepted
What does mean `^(*.c|*.md)`
In Zsh, ^ is a glob operator available when EXTENDED_GLOB is set, matching anything except the following pattern.
The parentheses group a pattern; this is useful in particular with disjunctions (|) ...
- 415k
1
vote
Read nth column iteratively in two large files, cut and paste side by side to create new nth file
Assumptions:
all files have at least one row (the header)
all files have the same number of rows
all files have the same number of columns
all files can fit into memory (via an awk array)
General ...
- 150
1
vote
Accepted
Read nth column iteratively in two large files, cut and paste side by side to create new nth file
Like this, using bash and awk to get number of columns and usual commands in the toolchest:
#!/bin/bash
for i in $(seq 1 $(awk '{print NF;exit}' test1.txt)); do
paste <(sed 1d test1.txt | cut ...
- 32.1k
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